Subsurface Woodford Black Shale, West Texas and Southeast New Mexico

RI0007. Subsurface Woodford Black Shale, West Texas and Southeast New Mexico, by S. P. Ellison, Jr. 20 p., 6 figs., 2 pls., 1950. Print.


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ABSTRACT
The geographic distribution, lithology, thickness, and paleontology of the subsurface Woodford in the Permian basin are described and illustrated. On the basis of conodonts and spores, the Woodford is assigned to the Upper Devonian and correlated with the Ready Pay member of the Percha shale in New Mexico, Woodford and Chattanooga of Oklahoma, Kansas, and Arkansas, and tentatively correlated with the Upper Devonian parts of the Caballos novaculite and Arkansas novaculite of Texas and Arkansas. The lithology and paleontology suggest a stagnant marine environment such as might be found in a partly enclosed arm of the sea. The postulated limits of this sea are outlined.


Keywords: Arkansas novaculite, Caballos novaculite, Devonian, lithology, New Mexico, Permian Basin, subsurface, Texas, Woodford

CONTENTS
Abstract
Introduction
Acknowledgments
Methods
Geographic distribution
Lithology
Thickness
Paleontology
Geologic age
Stratigraphy
Paleogeography
Environment of deposition
Summary
References cited

FIGURES

1. Well control for Woodford data

2. Woodford distribution map

3. Typical Woodford sections

4. Woodford isochore map

5. Restored thickness of Woodford

6. Woodford paleogeography

PLATES

I. Woodford cross sections
II. Conodonts of the Woodford shale
III. Brachiopods, crustaceans, and spores of the Woodford shale and of a shale below the Woodford


Citation
Ellison, S. P., 1950, Subsurface Woodford Black Shale, West Texas and Southeast New Mexico: The University of Texas at Austin, Bureau of Economic Geology, Report of Investigations No. 7, 20 p.